In addition to the Mocking Jay part II teaser/promo there was a panel and some new posters. They also released a new website for the Panem Revolution

Hunger Games Mockingjay Part II premise:With
the nation of Panem in a full scale war, Katniss confronts President
Snow (Donald Sutherland) in the final showdown. Teamed with a group of
her closest friends – including Gale (Liam Hemsworth), Finnick (Sam
Claflin), and Peeta (Josh Hutcherson) – Katniss goes off on a mission
with the unit from District 13 as they risk their lives to stage an
assassination attempt on President Snow who has become increasingly
obsessed with destroying her. The mortal traps, enemies, and moral
choices that await Katniss will challenge her more than any arena she
faced in The Hunger Games.

SDCC coverage:

The
Panel in all H of SDCC was apparently packed when white clad drummers
came out and began drumming then all of the stars filled in. A video
billed as "A message from District 13" showing capital soldiers doing
maneuvers was shown that then that had Katniss walking through them clad
for war. There was also a teaster. In addition to this a variety of posters that show the characters of the film in Hunger Games war paint were released. The posters are designed to look a bit like District 13 recruiting posters.

Another great bit of marketing for Hunger Games was the Capital and Rebel websites:

When you go the capital website it appears that the rebellion has hacked the system and a red clad Katniss sits on President Snow's throne.